In-Situ Constructing A Heterogeneous Layer on Lithium Metal Anodes for Dendrite-Free Lithium Deposition and High Li-ion Flux |
| |
| Authors: | Hong-Jun Liu Cheng-Ye Yang Mei-Chen Han Chun-Yu Yu Prof Xiaofeng Li Prof Zhong-Zhen Yu Prof Jin Qu |
| |
| Institution: | 1. State Key Laboratory of Organic-Inorganic Composites, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029 China;2. Beijing Key Laboratory of Advanced Functional Polymer Composites, Beijing University of Chemical Technology, Beijing, 100029 China;3. Beijing Key Laboratory of Advanced Functional Polymer Composites, Beijing University of Chemical Technology, Beijing, 100029 China
Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029 China |
| |
| Abstract: | Constructing efficient artificial solid electrolyte interface (SEI) film is extremely vital for the practical application of lithium metal batteries. Herein, a dense artificial SEI film, in which lithiophilic Zn/LixZny are uniformly but nonconsecutively dispersed in the consecutive Li+-conductors of LixSiOy, Li2O and LiOH, is constructed via the in situ reaction of layered zinc silicate nanosheets and Li. The consecutive Li+-conductors can promote the desolvation process of solvated-Li+ and regulate the transfer of lithium ions. The nonconsecutive lithiophilic metals are polarized by the internal electric field to boost the transfer of lithium ions, and lower the nucleation barrier. Therefore, a low polarization of ≈50 mV for 750 h at 2.0 mA cm?2 in symmetric cells, and a high capacity retention of 99.2 % in full cells with a high lithium iron phosphate areal loading of ≈13 mg cm?2 are achieved. This work offers new sights to develop advanced alkali metal anodes for efficient energy storage. |
| |
| Keywords: | Artificial Solid Electrolyte Interface Layered Zinc Silicate Lithiophilic Metals Lithium Ion Conductive Layer Lithium Metal Anodes |
|
|
